Cathode rays
notation: QC711
type: Concept
related: Cathodes

Electron tubes
notation: TK7871.7-TK7871.84
type: Concept

Cathodes
type: Concept
related: Cathode rays
member: collection LCSHAuthorizedHeadings
member: collection LCSH General
broader: Electron tubes
broader: Electrodes
created: 1986-02-11T00:00:00
in scheme: lcsh

Electrodes
notation: QD571-QD572
notation: TK7725
type: Concept